Silcrow 1.1.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is a product of Phonations. The software is included in Audio & Video Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
Silcrow is a very simple and easy-to-use video transcription software application. The program allows users to open a video and start typing. The script can be divided into smaller parts. However, when a subtitle is longer than 42 characters, a new line appears automatically. The tool currently supports DetX interoperability.
You may want to check out more software for Mac, such as Aiseesoft MPEG Converter for Mac, STAMPot or Tipard All Music Converter for Mac 2, which might be similar to Silcrow.